| zbrar[m] = mkzentry(key0, adr), key = key0, m + nused0 < # zbrar, m < # zbrar ⊦ ∃ n. ¬ nused0 < n ∧ zbrar[m + n].entry? ∧ zbrar[m + n].key = key |
zbrar[m] = mkzentry(key0, adr), m < # zbrar, m + nused0 < # zbrar ⊦ ∃ n. ¬ nused0 < n ∧ zbrar[m + n].entry? ∧ zbrar[m + n].key = key0